Mill for grinding paints, enamels, inks, and other viscous substances



July 12, 1932. 5. SMITH 1,867,184

MILL FOR GRINDING PAINTS, ENAMELS, INKS, AND OTHER VISCOUS SUBSTANCES Filed March 20, 1931 2 Sheets-Sheet l 5. SMITH July 12, 1932.

MILL FOR GRINDING PAINTS, ENAMELS, INKS, AND OTHER VISCOUS SUBSTANCES Filed March 20, 1931 2 Sheets-Sheet 2 Patented July 12, 1932 UNITED STATES PATENT OFFICE SIDNEY SMITH, OF LYNCROFT, ENGLAND, ASSIGNOR 'I'O LOUIS LINCOLN DRAKE, OF

. RIVERSIDE, CONNECTICUT I MILL FOR GRINDING PAINTS, ENAMELS, INKS, AND OTHER VISCOUS SUBSTANCES Application filed March 20, 1931, Serial No. 524,179, and in Great Britain June 24, 1980.

f rotating roller and a fixed grinding member.

In the usual mill of this kind the ground material is delivered to a receptacle open to the atmosphere and it is therefore liable to be contaminated by dust or other deleterious matter.

The object of the present invention is to produce a more efiicient and economical mill and one in which dust and similar deleterious matter is excluded.

According to this invention the grinding roller is mounted and totally enclosed in the casing of the mill, so that the circumferential surface and ends are completely immersed in the material to be ground and the casing of the mills is provided with one or more completely enclosed outlet chambers adjacent to the periphery of the rotating roller. The stationary grinding members form the sides of the chamber and the adjustable grinding members and the scrapers are mounted in said chambers. The chambers are each provided with an outlet orifice, in order to remove the ground material.

If desired, an additional adjustable grinding member ma be mounted in each chamber and is adjusta le from outside the chamher.

A preferred form of my invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my grinding mill;

Fig. 2 is an end elevation of same;

Fig. 3 is a section on line 33 of Fig. 2; and

Fig. 4; is a view partly in end elevation and partly in section.

Referring to the accompanying drawings, I provide a suitable base 1 on which is mounted the cylinder or casing 2 of the machine. I provide completely enclosed outlet chambers 28 in which are suitable frames 4: in which are mounted adjustable grinding blocks 6 located or held in place by plates 3, as shown in Fig. 3. I also provide small coil springs 8 bearing against the grinding blocks 6. 1 provide means whereby the ad ustable grinding blocks 6 may be readily shifted into or out of agreement with the grinding roller 16, either y rods 7 attached to grinding blocks 6 and to the ends of which in turn the eccentric handles 9 are mounted, or by other suitable means such as by spring loaded adustable screws with milled heads operated by hand from outside the chambers, whereby the blocks may be readily shifted into or out of engagement with the grinding roller 16. I also provide resiliently controlled scrapers 10 mounted on the suitable pivots or rods 11, and having shank extensions 12, to the ends of WhlCh are attached springs 13 which in turn are attached to the frame of the machine to hold the scrapers in contact with the surface of roller 16. I also provide suitable opposlte fixed grinding members 1 1 as shown 1n Fig. 3 bearing against the surface of roller 16 wh ch form the sides of the chamber.

I provlde a suitable hopper 15 for the receptlon of the material to be ground and whlch discharges into the space 25 between the gr nding roller 16 and the chambered cylinder or casing 2. The roller 16 totally enclosed in the cylinder or casing 2 of the machine, is aifixed to a shaft 17 which is mounted in suitable bearings 18. Shaft 17 carries conventional driving pulleys 19, as shown in Figs. 2 and 4.

Attached to the cylinder or casing 2 are suitable spacing plates 21 to which are affixed the side plates 20. Mounted in plates 20 I provide adaptors 22 which carry balls 23 which bear against the opposite cam faces 24 of roller 16 and thus function to produce a longitudinally reciprocating movement of the roller 16 at the same time that it is being rotated. I provide opposite discharge outlets 26 for the discharge of the ground material, and also provide suitable lids or valves I to be ground is placed in the hopper 15 it is completely enclosed until it emerges,

ground, through the delivery or outlet pipes 26. It cannot therefor be contaminated by the admixture of dust or other deleterious I matter.

It will be obvious that the number and shape of the closed chambers 28 in which the scraper blades 10 are mounted may be varied as required and that suitable scrapers may be mounted in each chamber; also that the suitable removablecovei's or lids may be provided for the chambers 28.

I claim:

1. i In a grinding mill of the type described, thecombination of a casing, a roller-mounted in spaced relation to the casing, and total- 1 enclosed therein, the circumferential sur fice and ends of the roller being completely immersed in the material to be ground, a hopper arranged to empty material onto the roller, fixed grinding members in contact with the surface of the roller, spring pressed adjustable grinding members ada ted to be moved into or out of contact with t e surface of the roller, eccentric handles operatiyely connected with said adjustable grinding members for manually adjusting same, scrapers arranged to contact with the sur-. face of the roller, and completely enclosed outlet chambers in which the aforesaid fixed and adjustable rinding members and scrapers are mounte and outlet discharge members for the discharge of pulverized material.

2. In a grinding mill of the type described, the combination of a casing, a roller mounted in spaced relation to the casing, and totally enclosed therein, the circumferential surface and ends of the roller being completely immersed in the material to be ground, a-hopper. arran ed 'to empty material onto the roller, fixe grinding membersin contactwith the surface of the roller, spriiiig pressed adjustable grinding members apted to be moved into or out of contact with the surface of the roller, eccentric handles operatively connected with said adjustable grinding members for manually adjusting same, resiliently controlled scra ers arranged to contact with the surface 0 the roller, and completel enclosed outlet chambers in which the a oresaid fixed and adjustable grinding members and resiliently controlled scra ers are mounted, and outlet discharge mem ers for the discharge of pulverized material.

3. In a mill for grinding paints, enamels, inks and other viscous substances, the combination of a casing, a hopper in said casing, a grinding roller mounted and totally enclosed in the casing whereby the circumferential surface and ends are completely immersed in the material to be ound, grinding members bearing on the r0 ler, and completely enclosed outlet chambers positioned in the casing and spaced from the hopper, the grind a grindin roller stationary grinding members beari ng on the roller, scrapers, outlet chambers in which the aforesaid inding members and scrapers are mounted, t e roller. 7

being mounted and totally enclosed in the casing whereb the surface andends of the grinding mem ers are completely immersed in the material to be round, the continuity of the casing being bro en at the points where the hopper and outlet chambers are placed.

5. In a grinding mill of the ty e described, the combination. of a casing, a iiopper ositioned in and breaking the continuity o the casing, a grinding roller mounted and totally enclosed in the casing the circumferential surface and ends of theroller being completely immersed in the material to be ground spaced outlet chambers substantiall enclose in and breaking the continuity of t e casing, and adjustable grinding members bearing on {She roller and mounted in the outlet chamers. Y

6. In a grinding mill of the'type described, the combination of a casing having a ho per chamber, a grinding roller mounted an totally enclosed in the casing, the circumferential surface and ends of the roller being completely immersed in the material to be ground, completely enclosed outlet chambers, fixed grinding members mounted in said outlet chambers and bearing on the roller, adjustable grinding members mounted in said outlet chambers and arrangednfor manual control, the continuity of the casing bein broken at the points where the hopper and outlet chambers are placed.

7. In a grinding mill of the type described the combination of a casing having spaced hopper and discharge chambers breaking the continuity of the casing, a roller mounted and totally enclosed in the casing, the circumferential surface and ends of the roller being com letely immersed in the material to be groun said roller having opposite end cam faces, stationary elements contacting with the end cam faces of the roller to cause same to reciprocate longitudinally, stationary grinding members positioned to form the sides of the discharge chambers and bearing on the surface of the roller, and adjustable grinding members mounted in the discharge chambers and adapted to be shifted into or out of contact with the surface of the roller.

8. In a grinding mill of the t pe described the combination of a casing, a liopper placed in the casing, a roller mounted and totally enclosed in the casing, the circumferential surface and ends of the roller bein complete- 1y immersed in the material toe ground, said roller havingopposite cam faces on its ends, stationary elements contacting with the cam faces of the roller to cause same to reciprocate longitudinally, stationa grinding members in contact with the sur ace of the roller, adjustable grinding members mounted 18 Ill posed at opposite positions of the rollers, and

completely enclosed outlet chambers breaking the continuity of the casing and spaced from the hopper on opposite sides of the casing.

SIDNEY SMITH. 

